The Persian period (539-332 BCE) sits somewhat awkwardly within the study of Second Temple Judaism. Amidst a myriad of issues and debates, the approach to the Persian period is fundamentally complicated by the difficulty in labelling communities -- whether or not the communities in the province of Yehud, in Egypt, or in the Eastern Diaspora can even be called "Jewish," a label denoting a type of ethnic and religious symbiosis that some scholars are...